1 # HandleLibcxxFlags - A set of macros used to setup the flags used to compile
2 # and link libc++abi. These macros add flags to the following CMake variables.
3 # - LIBUNWIND_COMPILE_FLAGS: flags used to compile libunwind
4 # - LIBUNWIND_LINK_FLAGS: flags used to link libunwind
5 # - LIBUNWIND_LIBRARIES: libraries to link libunwind to.
7 include(CheckCCompilerFlag)
8 include(CheckCXXCompilerFlag)
10 unset(add_flag_if_supported)
12 # Mangle the name of a compiler flag into a valid CMake identifier.
13 # Ex: --std=c++11 -> STD_EQ_CXX11
14 macro(mangle_name str output)
15 string(STRIP "${str}" strippedStr)
16 string(REGEX REPLACE "^/" "" strippedStr "${strippedStr}")
17 string(REGEX REPLACE "^-+" "" strippedStr "${strippedStr}")
18 string(REGEX REPLACE "-+$" "" strippedStr "${strippedStr}")
19 string(REPLACE "-" "_" strippedStr "${strippedStr}")
20 string(REPLACE "=" "_EQ_" strippedStr "${strippedStr}")
21 string(REPLACE "+" "X" strippedStr "${strippedStr}")
22 string(TOUPPER "${strippedStr}" ${output})
25 # Remove a list of flags from all CMake variables that affect compile flags.
26 # This can be used to remove unwanted flags specified on the command line
27 # or added in other parts of LLVM's cmake configuration.
30 string(REPLACE "${var}" "" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")
31 string(REPLACE "${var}" "" CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL}")
32 string(REPLACE "${var}" "" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
33 string(REPLACE "${var}" "" CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
34 string(REPLACE "${var}" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
35 string(REPLACE "${var}" "" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
36 string(REPLACE "${var}" "" CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS}")
37 string(REPLACE "${var}" "" CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}")
38 string(REPLACE "${var}" "" CMAKE_SHARED_MODULE_FLAGS "${CMAKE_SHARED_MODULE_FLAGS}")
39 remove_definitions(${var})
41 endmacro(remove_flags)
43 macro(check_flag_supported flag)
44 mangle_name("${flag}" flagname)
45 check_cxx_compiler_flag("${flag}" "LIBUNWIND_SUPPORTS_${flagname}_FLAG")
48 macro(append_flags DEST)
49 foreach(value ${ARGN})
50 list(APPEND ${DEST} ${value})
51 list(APPEND ${DEST} ${value})
55 # If the specified 'condition' is true then append the specified list of flags to DEST
56 macro(append_flags_if condition DEST)
58 list(APPEND ${DEST} ${ARGN})
62 # Add each flag in the list specified by DEST if that flag is supported by the current compiler.
63 macro(append_flags_if_supported DEST)
65 mangle_name("${flag}" flagname)
66 check_cxx_compiler_flag("${flag}" "LIBUNWIND_SUPPORTS_${flagname}_FLAG")
67 append_flags_if(LIBUNWIND_SUPPORTS_${flagname}_FLAG ${DEST} ${flag})
71 # Add a macro definition if condition is true.
72 macro(define_if condition def)
74 add_definitions(${def})
78 # Add a macro definition if condition is not true.
79 macro(define_if_not condition def)
81 add_definitions(${def})
85 # Add a macro definition to the __config_site file if the specified condition
86 # is 'true'. Note that '-D${def}' is not added. Instead it is expected that
87 # the build include the '__config_site' header.
88 macro(config_define_if condition def)
91 set(LIBUNWIND_NEEDS_SITE_CONFIG ON)
95 macro(config_define_if_not condition def)
98 set(LIBUNWIND_NEEDS_SITE_CONFIG ON)
102 macro(config_define value def)
104 set(LIBUNWIND_NEEDS_SITE_CONFIG ON)
107 # Add a list of flags to all of 'CMAKE_CXX_FLAGS', 'CMAKE_C_FLAGS',
108 # 'LIBUNWIND_COMPILE_FLAGS' and 'LIBUNWIND_LINK_FLAGS'.
109 macro(add_target_flags)
110 foreach(value ${ARGN})
111 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${value}")
112 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${value}")
113 list(APPEND LIBUNWIND_COMPILE_FLAGS ${value})
114 list(APPEND LIBUNWIND_LINK_FLAGS ${value})
118 # If the specified 'condition' is true then add a list of flags to
119 # all of 'CMAKE_CXX_FLAGS', 'CMAKE_C_FLAGS', 'LIBUNWIND_COMPILE_FLAGS'
120 # and 'LIBUNWIND_LINK_FLAGS'.
121 macro(add_target_flags_if condition)
123 add_target_flags(${ARGN})
127 # Add all the flags supported by the compiler to all of
128 # 'CMAKE_CXX_FLAGS', 'CMAKE_C_FLAGS', 'LIBUNWIND_COMPILE_FLAGS'
129 # and 'LIBUNWIND_LINK_FLAGS'.
130 macro(add_target_flags_if_supported)
131 foreach(flag ${ARGN})
132 mangle_name("${flag}" flagname)
133 check_cxx_compiler_flag("${flag}" "LIBUNWIND_SUPPORTS_${flagname}_FLAG")
134 add_target_flags_if(LIBUNWIND_SUPPORTS_${flagname}_FLAG ${flag})
138 # Add a specified list of flags to both 'LIBUNWIND_COMPILE_FLAGS' and
139 # 'LIBUNWIND_LINK_FLAGS'.
141 foreach(value ${ARGN})
142 list(APPEND LIBUNWIND_COMPILE_FLAGS ${value})
143 list(APPEND LIBUNWIND_LINK_FLAGS ${value})
147 # If the specified 'condition' is true then add a list of flags to both
148 # 'LIBUNWIND_COMPILE_FLAGS' and 'LIBUNWIND_LINK_FLAGS'.
149 macro(add_flags_if condition)
155 # Add each flag in the list to LIBUNWIND_COMPILE_FLAGS and LIBUNWIND_LINK_FLAGS
156 # if that flag is supported by the current compiler.
157 macro(add_flags_if_supported)
158 foreach(flag ${ARGN})
159 mangle_name("${flag}" flagname)
160 check_cxx_compiler_flag("${flag}" "LIBUNWIND_SUPPORTS_${flagname}_FLAG")
161 add_flags_if(LIBUNWIND_SUPPORTS_${flagname}_FLAG ${flag})
165 # Add a list of flags to 'LIBUNWIND_COMPILE_FLAGS'.
166 macro(add_compile_flags)
168 list(APPEND LIBUNWIND_COMPILE_FLAGS ${f})
172 # If 'condition' is true then add the specified list of flags to
173 # 'LIBUNWIND_COMPILE_FLAGS'
174 macro(add_compile_flags_if condition)
176 add_compile_flags(${ARGN})
180 # For each specified flag, add that flag to 'LIBUNWIND_COMPILE_FLAGS' if the
181 # flag is supported by the C++ compiler.
182 macro(add_compile_flags_if_supported)
183 foreach(flag ${ARGN})
184 mangle_name("${flag}" flagname)
185 check_cxx_compiler_flag("${flag}" "LIBUNWIND_SUPPORTS_${flagname}_FLAG")
186 add_compile_flags_if(LIBUNWIND_SUPPORTS_${flagname}_FLAG ${flag})
190 # Add a list of flags to 'LIBUNWIND_C_FLAGS'.
193 list(APPEND LIBUNWIND_C_FLAGS ${f})
197 # If 'condition' is true then add the specified list of flags to
198 # 'LIBUNWIND_C_FLAGS'
199 macro(add_c_flags_if condition)
205 # For each specified flag, add that flag to 'LIBUNWIND_C_FLAGS' if the
206 # flag is supported by the C compiler.
207 macro(add_c_compile_flags_if_supported)
208 foreach(flag ${ARGN})
209 mangle_name("${flag}" flagname)
210 check_c_compiler_flag("${flag}" "LIBUNWIND_SUPPORTS_${flagname}_FLAG")
211 add_c_flags_if(LIBUNWIND_SUPPORTS_${flagname}_FLAG ${flag})
215 # Add a list of flags to 'LIBUNWIND_CXX_FLAGS'.
218 list(APPEND LIBUNWIND_CXX_FLAGS ${f})
222 # If 'condition' is true then add the specified list of flags to
223 # 'LIBUNWIND_CXX_FLAGS'
224 macro(add_cxx_flags_if condition)
226 add_cxx_flags(${ARGN})
230 # For each specified flag, add that flag to 'LIBUNWIND_CXX_FLAGS' if the
231 # flag is supported by the C compiler.
232 macro(add_cxx_compile_flags_if_supported)
233 foreach(flag ${ARGN})
234 mangle_name("${flag}" flagname)
235 check_cxx_compiler_flag("${flag}" "LIBUNWIND_SUPPORTS_${flagname}_FLAG")
236 add_cxx_flags_if(LIBUNWIND_SUPPORTS_${flagname}_FLAG ${flag})
240 # Add a list of flags to 'LIBUNWIND_LINK_FLAGS'.
241 macro(add_link_flags)
243 list(APPEND LIBUNWIND_LINK_FLAGS ${f})
247 # If 'condition' is true then add the specified list of flags to
248 # 'LIBUNWIND_LINK_FLAGS'
249 macro(add_link_flags_if condition)
251 add_link_flags(${ARGN})
255 # For each specified flag, add that flag to 'LIBUNWIND_LINK_FLAGS' if the
256 # flag is supported by the C++ compiler.
257 macro(add_link_flags_if_supported)
258 foreach(flag ${ARGN})
259 mangle_name("${flag}" flagname)
260 check_cxx_compiler_flag("${flag}" "LIBUNWIND_SUPPORTS_${flagname}_FLAG")
261 add_link_flags_if(LIBUNWIND_SUPPORTS_${flagname}_FLAG ${flag})
265 # Add a list of libraries or link flags to 'LIBUNWIND_LIBRARIES'.
266 macro(add_library_flags)
268 list(APPEND LIBUNWIND_LIBRARIES ${lib})
272 # if 'condition' is true then add the specified list of libraries and flags
273 # to 'LIBUNWIND_LIBRARIES'.
274 macro(add_library_flags_if condition)
276 add_library_flags(${ARGN})
280 # Turn a comma separated CMake list into a space separated string.
281 macro(split_list listname)
282 string(REPLACE ";" " " ${listname} "${${listname}}")